Belt tightener and spreader.



1. KA'PLAN. BELT TIGHTENEP. AND SPREADER.

APPLICATION `FlLiD *1ML 4, E91?.

' l5 machine belts and belts for other machines supporting arm l0, has an elongated slot ll, 70

Specification of Letters Patent. lidttti'tll llllity 225, 'lldl'lfl'D .Application filed January 1912?. Serial No. 1411493.

To @ZZ coo/m :it mag/concern: around which pulleys 5 and C is trained a Be it known that l, Jiloca lArniN, a eiti- 'twisted belt 7. In accordance with the conizen ofthe United States, and a resident ol" inon practice, the coned pulley is employed Chicago, county of Cook, and State ot lllito drive the sewing machine (not shown) 5 noislhare invented certain new and useful which is .located upon a table above the pul- 60 lniprovenients in `lielt 'llighteners and leys. ipreaders, of which the following is derlhe belt tightener comprises a lengthwise cla/red to be a full, vclear, and exact descrip slotted standard S, which is formed with a tion. i ldiese 9, at its lower end, which lney' be l@ 'This invention relates to belt tighteners bolted or otherwise secured to any support- 65 and spreaders, and it has been particularly ing structure, as for instance the Hoor of designed Ltor'nse in connection with twisted the ouildingr` and l0, designates a supportbelts, although it is well adapted for aise ing arm adjustably mounted upon the upiii connection with straight belts. Sewing per end olf said standard 8. lis shown, said aire ent to stretch cmisiderably :trom usc and ltorined therein, end a bolt 12, passes Wear, and heretofore it has been customary through the slots of the standard 8, and to cut a piece ell' the belt when it has erin l0, andis provided Withe thumb screw stretched and to reconnect the ends, lt has lil, Upon itsv threaded end, by means of 2@ also been proposed to use belts made oi? rope, which the standard and arm may be rigidly 75 but there is consic'lerable objection to cntclamped together against relative movement ting oil the ends oit rope belts and recouin any position o'l adjustment. The arm 10, @ling the ends thereof. 'lhe present invention may be set in alineinent with the standard 8, is designed to provide a belt tightener, it' desired, or it may he set at an angle therey which maybe readily adjusted totahenpthe to, as shown in dotted lines in llig. l, to 80 sl-aclr in the belt, and which inay also be adobtain certain leatores of adjustment. insted 'to prevent the one part o'ly the. belt lllountedlipon the upper end olsaid arm,to Alro'ni riibbingngainst the other where the niovoina planeatright anglesto the plane of belt crosses itlsell 'lilith the use olf the pressaid erin, is a pulley carrying head 14, which ent device, it is unnecessary to cut eti' pieces 1to1-ined with :in arc shaped elongated slot 85 l 'the helt when itmstretchess but thD slaclt l5, that receives two lugs l5, 1(3,fwhich pro- Inay he taken op listing; the belt tightject outward from the face 17, of the arm l0. The invention consisxs.y therefore, in i screr.T or bolt 1S, passes through a hole the several novel 'Ecritures of construction, formed in the upper eind of the arm 10, arrangement end combination el? parts here-- and extends Iietween the li'lgs 1G, and` has 90 inater fully set forth andparticularly de a Washer i9, and Wingnut 20, upon its fined in the claims. outer end, which wingnut may he tightened The invention is clearly illustrated in the up to clamp the pulley carrying head lst accompanying dran'irigjn which Figure l, against the face .17, olE the arm l0. Said is a side elevatioi'i oi a belt tightener, exnhead ll, provided with a forked portion 95 body-inf; a simple form of the present in- 2Q, havingn alined bearing apertures formed vention, and showing the same applied to therein for the receptionv of the shaft Q3, of twisted belt of a sewinginachine driringapu the grooved pulley 24. rl`he pulley may paratns; "ikej. 2, is a 1ilan of the parte seen turn in a plane approximately parallel with in Fig. l; Fig. 3, is a View of the device the plane of the belt, but the head lll, may 100 -loolring in the direction o' the arrow 3, in be shifted upon the lugs 16, to 'ilt the pul- Fig. l; Fig. al, is a perspective View of a ley out of a vertical plane, when desiring fragment of the upper end ot a certain arno; to obtain certain Jezrtures of adjustment. and Fig. 5, is a section taken on line 5-5 ln use, the device is fastened to the floor, all ofliig. 3. or other support, below or above the twisted .1.05

Relerring to said drawing, the reference belt, with the `pulley 24, located in a. plane numeral 5, designates a driving pulley of a. to one side oi the/plane ol? the twisted belt, sewing,1 machine driving' mechanism, such as :ind pre:terablyf near the intersecting points is usually employed in tailoring` 'esteblishof the belt. The belt is then placed upon ments, end 6, designates a ,coned pulley the pulley' 24, and the arm raised to put tension upon the belt;` the belt carrying head 14, is adjusted upon its support so as to tilt the pulley 24, in such manner that any tendency for the belt to run out of the grooves of the pulleys is wholly eliminated. In other words, the pulley 24, is set so that a sidewise pull upon it by the belt, which might otherwise cause the belt to leavethe groove of the pulley, is prevented because of the angle assumed by the pulley 24.-

When the belt becomes slack, the operator simply `loosens the wing nut `13, raises the arm l0, until the slack is taken out of the belt and retightens the wing nut 13. Under certain conditions, it may be found advisable not only to raise the adjustable arm 10, but to swing it toward the larger pulley 5, and thereby take up more of the slack as it occurs.

4of cb'nstruction shown and described is pos- 'sible Without departing from thie spirit of this invention, and I desire, therefore, not to limit myself t0 the exact form of construction shown and described, but intend in the following claims to point out all the n- Vention disclosed herein.

' .I claim as new, and desire to secure by Letters Patent:

i 1. A belt tightener, comprising a stand ard, an arm adjustably secured thereon, and movable both lengthwise of said standard .and angularly with respect thereto in a plane approximately parallel with the belt, and a grooved pulley, over which a belt may run,isupported by said' standard.

2. A belt ti ghtener, comprising a standard,

an arm adjustably carried thereby, and mov able lengthwise of the standard, and also angularly with respect thereto in a direc tion approximately parallel with the belt, a pulley supporting head, mounted upon said arm and adjustable i,n an arc of a circle reenter transverse to the plane of the belt, and a grooved pulley journaled upon saidhead.

3. A belt tightener, eomprisinga standard, an' arm adj ustably mounted thereon, and capable of beingmoved lengthwise oi the standard, and also in an are of ai circle in a plane approximately parallel with the plane of the belt, a pulley carrying head mounted upon said arm to move in a plane approximately at right angles to the plane of movement of said arm, and a grooved pulley journaled upon said head, said pulley being adapted for engagement with the belt.

4. 'A belt tightener, comprisinga standard, an adjustable arm secured to said/standard, and movable in an are of a circle parallel with the belt, a pulley carrying head having a slot formed therein, and movable in an arc of a circle transverse to the plane ot -moveme'it of said arm, clamping means extending` through said arm and vslot of the head for holding said head in any position of adjustment, and a grooved pulley journaled in said head on an axis transverse to the belt.

5. A belt tightener, comprising a support, two lugs projecting from one tace ot said support, a pulley carrying head having an arcuate slot for the reception of said lugs, and said head being mounted upon said lugs, a bolt and nut for clamping the 'head to said support, and a pulley journaled upon said head.

6. A belt tightencr, comprising a support formed with a pair of lugs projecting from one face thereof, a pulley carrying@ head, having a segmental slot formed ther-iin and arranged for the reception of said lugs, clamping means for clamping said head to said support in any position ot' adjustment, and-a grooved pulley journaled upon said head and rotating in a plane'at right angles to said segmental slotted portion.4

7. A belt tiglitener and spreader for round, twisted belts, comprising a support, a pulley carrying head mounted on said support and angularly movable with respect thereto, and a grooved pulley journaled in said head, said pulley being arranged to engagethe twisted belt at its crossing point, and to one side of the plane thereof, whereby the belt is prevented 'fromrubbing upon itself at the crossing point. v

JCB KAPLAN. 

